Crosswordiee.com

% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Mmmmm ...:

MMMMM: Boy, that's good!
DELISH: Mmmmm
OLIVE: Fruit that might be stuffed with cheese or jalapeño (mmmmm)
ISEE: Mmmmm
YUM: Mmmmm ...